3778881 has 4 divisors (see below), whose sum is σ = 5038512. Its totient is φ = 2519252.

The previous prime is 3778861. The next prime is 3778897. The reversal of 3778881 is 1888773.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1888773 = 3 ⋅629591.

It is a cyclic number.

It is not a de Polignac number, because 3778881 - 2¹⁰ = 3777857 is a prime.

It is a super-2 number, since 2×3778881² = 28559883224322, which contains 22 as substring.

It is a D-number.

It is not an unprimeable number, because it can be changed into a prime (3778861) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 629811 + ... + 629816.

It is an arithmetic number, because the mean of its divisors is an integer number (1259628).

Almost surely, 2^3778881 is an apocalyptic number.

It is an amenable number.

3778881 is a deficient number, since it is larger than the sum of its proper divisors (1259631).

3778881 is a wasteful number, since it uses less digits than its factorization.

3778881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1259630.

The product of its digits is 75264, while the sum is 42.

The square root of 3778881 is about 1943.9344124738. The cubic root of 3778881 is about 155.7594501075.

The spelling of 3778881 in words is "three million, seven hundred seventy-eight thousand, eight hundred eighty-one".